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Sedbober [7]
2 years ago
14

Please hellppp i will mark brainliest ​

Mathematics
1 answer:
castortr0y [4]2 years ago
8 0
30 degrees it's right
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What is the equation of a line passing through the point (a, b) and having a slope of b?
fgiga [73]
The answer is y=bx-b(a-1), because when x=a then y=b.
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2 years ago
Sin^22x - 2cos2x + 2=0
zhuklara [117]

Answer:

x=πn, n∈Z

Step-by-step explanation:

if sin²2x=1-cos²2x, then

1-cos²2x-2cos2x+2=0; ⇒ cos²2x+2cos2x-3=0; ⇔ (cos2x+3)(cos2x-1)=0;

\left[\begin{array}{cc}cos2x+3=0\\cos2x-1=0\\\end{array} \  \ \left[\begin{array}{cc}x \ 'does-not-exist'\\cos2x=1\\\end{array} \  \ 2x=2\pi n, n=Z \  x=\pi n, n=Z

5 0
2 years ago
Leah has a 20% off coupon for a sports store. There is a tennis racket that is available at a discount of 10%. The store applies
Art [367]

Answer:the orginal price of the tennis racket is $47

Step-by-step explanation:

Let x represent the original price of the tennis racket at the sports store.

Leah has a 20% off coupon for the sports store. The tennis racket is available at a discount of 10%.

The store applies the coupon after the 10% is taken. The value of the discount on the original price of the tennis racket would be

10/100 × x = 0.1 × x = $0.1x

The discounted price of the racket would be

x - 0.1x = 0.9x

The value of the coupon would be

20/100 × 0.9x = 0.2 × 0.9x = 0.18x

The selling price after the coupon was applied would be

0.9x - 0.18x = 0.72x

She buys the racket for $34. This means that

0.72x = 34

x = 34/0.72 = $47

3 0
2 years ago
Translate the sentence into an inequality.<br> Nine times b is at least - 18.
nirvana33 [79]

Answer:

9b≥ -18

Step-by-step explanation:

6 0
2 years ago
Fred needs to write the equation of the line. He used (10, 64) and (12.5, 73) to find the slope, which is 3.6. The equation of t
UNO [17]

Answer:

y = 3.6x + 28

Step-by-step explanation:

y = Mx + c

64 = 3.6(10) + c

64 = 36 + c

64 - 36 = c

28 = c

3 0
2 years ago
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